Silo.



G. w. CAVANAUGH L 1. PETERSON.

SILO.

APPLICATION PILEI; MAPL 4. m5.

l, 175,237. Patented ManM, 1916.

/l//lfl//ll/ THS CDLUMBIA PLANDGRAPH CO.. WASHINGTDN. n. c.

STATES* oEEIoE.

GEORGE WALTER oAvANAUeH, OE CANNON CITY, AND JOHN PETERSON, OE EAEIBAULT,

MINNESOTA. Y

SILO.

To all whom 'it may concern:

Be it known that we, GEORGE W. CAVA- NAUGH and JOHN PETERSON, citizens of the United States, residents, respectively, of Cannon City and Faribault, Rice county, Minnesota, have invented certain new and useful Improvements in Silos, of which the following is a specification.

The object of our invention is to provide a silo so constructed that a circulation of air will be established around the Walls and through the top of the silo to prevent freezing of the contents.

Other objects of the invention will appear from the following detailed description.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.v

In the accompanying drawings forming part of this specification, Figure 1 is a vertical sectional view of a silo embodying our invention. Fig. 2 is a horizontal sectional view of the same.

In the drawing, 2 represents the base of the silo. This may be constructed of any suitable material, preferably concrete, and is provided with a series of radially arranged air-ducts 3, extending horizontally through the base and communicating at their outer ends with a corresponding number of vertical ports 4. At their inner ends the ducts communicate with an upright flue 5. The walls of the silo consist preferably of an outer shell or jacket 6, an intermediate wall 7 and an inner wall 8. These walls are preferably made of sheet metal. The jacket and the intermediate wall are spaced apart to form an annular dead air space 9, ya flange 10 being formed on the base upon which the jacket 6 and the wall 7 are seated. the upper surface of said flange forming the bottom of the dead air chamber. Between the intermediate wall and the inner wall 8 an annular chamber 11 is provided, and the chambers 9V and 11. are preferably divided vertically by upright studs 12 and 13, arranged at intervals around the circumference of the silo. The studs 13 separating the walls 7 and 8 from one another, form therewith a series of vertical air passages, communicating at their lower ends with the ports 4, and through these ports with the horizontal ducts 3.

The roof of the silo has an outer wall 14,

Specification of Letters Patent. Patented Mar,

.- Application led March 4, 1915. Serial No. 12,129.v

, an intermediate wall 15 and aninner wall roof, the roof being substantially conical inYAY formV as usual in structures of this kind. The roof is preferably composed ofsheet metal and rings of angle bar metal 19 and 20 are provided for joining the walls 15 and 16 to the upper portion of the walls 7 and 8, and the lower edge of the wall 14 is carried outwardly beyond the jacket 6 and is vsecured thereto by a ring of metal 2l curvedv in cross section to fit the angle between the roof and the jacket wall.' At the intersection of the flue 5 with the wall 16 we prefer to provide a ring 22 of Vangle material for holding the roof plate and the iiue in their proper relative position. This construction will provide a dead air space around the walls and over the top of the silo while the air heated through the fermentation of the vegetable material in the silo will circulate freely through the walls and under the floor and up throughthe central iiuearound under the roof and thereby prevent the freezing of the contents of the silo.

The silo may be made in any suitable size, according to the desired capacity and access to the interior of the silo may be obtained through the doors 23 having bearings in the posts 12 and 13, and preferably composed of sections hinged together at 25.

For convenience in mounting the outside of the silo, rods 26 are provided, pivoted to screw eyes 27 on one side of the door and having hooked ends to engage corresponding screw eyes on the opposite side. These rods are for convenience in ascending or descending the walls of the silo.

Ve claim as our invention:

1. A silo having an upright air flue, horiintermediate Wall spaced from said jacket to form a dead air chamber, an inner wall spaced from said intermediate Wall to form vertical air passages, a centrally arranged the apex-of the roof to the base of the silo and. communicati-ngr with the outer end of said duct, and a vertical Hue communicating vat its lower end With the inner ends of said (duct, and at its upper end with said air circulating Vspace in the apex of the roof, for the purpose specified.

fl. A silo having air passages in its base, side Walls and roof, and anl upright'ue communicating at its lower end with the air a passages in said base-and at its upper end With the passage in the roof, through which passages and flue currents of air may circulate.

In Witness whereof, We have hereunto set our` hands' this 25th day of February, 1915.

GEORGE `WALTER ,CAVANAUGIL JOHN PETERSDN.

Vlfitnesses:

WM. WACHLIN, C. M. Saoon'ron.,`

Copies of this patent may be obtained for ve cents each, `by addressing the Commissioner of Patents, Washington, I), 10.1 

